Initial Grant. In connection with the commencement of your employment, the Company will, subject to standard Board approval, grant you an option (the “Option”) to purchase 140,000 shares of the Company’s Common Stock (the “Shares”) at an exercise price equal to the fair market value of the common stock on the date of grant, as determined in accordance with the terms of the Company’s 2010 Equity Incentive Plan (the “Plan”).

Initial Grant. In connection with the commencement of your employment, subject to standard Board approval, the Company will grant you an option (the “Option”) to purchase 100,000 shares of the Company’s Common Stock (the “Shares”) at an exercise price equal to the fair market value of the common stock on the date of grant, as determined in accordance with the terms of the Company’s 2010 Equity Incentive Plan (the “Plan”).

In connection with entering into this letter agreement, following the commencement of your employment with the Company, the Company will recommend to the Board of Directors or its designee that it grant you an option to purchase 130,000 shares of the Company’s common stock (the “Stock Option”) at a per-share exercise price equal to the fair market value of a share of the Company’s common stock on the date of grant (as determined under the Plan (as defined below)), provided that you are employed by the Company on the date of grant Subject to your continued employment with the Company through the applicable vesting date, 25% of the shares underlying the Stock Option will vest on the first anniversary of the date you commence employment with the Company and 1/48th of the total number of shares initially underlying the Stock Option will vest on each monthly anniversary thereafter. The Stock Option will otherwise be subject to the terms and conditions of the Company’s 2019 Incentive Award Plan (the “Plan”) and a stock option agreement to be entered into between you and the Company.

Stock Option Grant. In connection with the commencement of your employment, the Company will recommend that the Board of Directors, at the next regularly scheduled meeting, grant you an option to purchase 145,000 shares of the Company’s Common Stock (“Option Shares”) with an exercise price equal to the fair market value on the date of the grant. These option shares will vest at the rate of 25% of the shares on the twelve (12) month anniversary of your Vesting Commencement Date (as defined in your Stock Option Agreement, which date will be your Start Date, as defined above) and the remaining Option Shares will vest monthly thereafter at the rate of 1/48 of the total number of the Option Shares per month. Vesting will, of course, depend on your continued employment with the Company. The option will be subject to the terms of the Company’s 2011 Equity Incentive Plan and the Stock Option Agreement between you and the Company.

Stock Option Grant: Subject to approval by the Company’s Board of Directors (the “Board”), the Company anticipates granting you an option to purchase 100,000 shares of the Company’s common stock at the fair market value as determined by the Board as of the date of grant (the “Option”). The anticipated Option will be governed by the terms and conditions of the Company’s 2019 Equity Incentive Plan (the “Plan”) and your grant agreement, and will include a four year vesting schedule, under which 1/4th of the shares vest one year after the vesting commencement date and the balance of the shares vest in a series of 36 successive equal monthly installments measured from the first anniversary of the vesting commencement date, until either the Option is fully vested or your continuous service (as defined in the Plan) terminates, whichever occurs first.

Initial Stock Option Grant. In connection with commencement of your employment and subject to the approval of the Company’s Board of Directors (the “Board”), the Company shall grant you an option to purchase 600,000 shares of the Company’s Common Stock (the “Option”). The exercise price per share will be equal to the fair market value per share on the date the Option is granted, as determined by the Company’s Board of Directors in good faith compliance with applicable guidance in order to avoid having the Option be treated as deferred compensation under Section 409A of the Internal Revenue Code of 1986, as amended. There is no guarantee that the Internal Revenue Service will agree with this value. You should consult with your own tax advisor concerning the tax risks associated with accepting an option to purchase the Company’s Common Stock. The term of the Option shall be 10 years, subject to earlier expiration in the event of the termination of your services to the Company. The Option shall vest and become exercisable at the rate of 20% of the total number of option shares after the first six months of continuous service, and thereafter 20% of the total number of option shares shall become vested and exercisable in equal installments every six months of continuous service. The Option shall be subject to the other terms and conditions set forth in the Company’s Share Option Plan (the “Stock Plan”) and in the Company's standard form of stock Option Commitment (the “Option Commitment”).

Equity. Subject to the terms of the Company's then applicable equity incentive plan ("'Incentive Plan") and form of option agreement, you will be granted an option to purchase an aggregate of 150,000 shares of the Company’s common stock, par value $0.01 (the “Common Stock”) at an exercise price per share equal to the Fair Market Value (as defined in the Incentive Plan) of the Common Stock on the date of the grant, intended to qualify as an “incentive stock option'' to the to the maximum extent allowed under Section 422 of the Internal Revenue Code. The option will vest as to one fourth (1/4th) of the shares, on the first anniversary of the Start Date, and the remainder will vest at one forty-eighth (1/48th) per month thereafter. All tax consequences resulting from the grant, vesting, or exercise of the option to or by you, or from the disposition by you of such shares of Common Stock, will be your responsibility. You also will be eligible for annual equity grants at the same time when other executives receive these grants.

Stock Option. In connection with entering into this offer letter, in connection with the commencement of your employment with the Company and provided that you are employed by the Company on the date of grant, the Company will grant you an option to purchase 320,000 shares of the Company’s common stock (the “Stock Option”) at a per share exercise price equal to the Fair Market Value of a share of the Company’s common stock on the date of grant (as determined in accordance with the Company’s 2011 Incentive Award Plan), which is expected to be on the commencement date of your employment. Subject to your continued employment with the Company through the applicable vesting date, 1/3rd of the shares underlying the Stock Option will vest on the first anniversary of the Effective Date and 1/36th of the shares underlying the Stock Option will vest on each monthly anniversary of the Effective Date thereafter. Subject to the foregoing, the terms and conditions of the Stock Option must be approved by the Board of Directors, or a subcommittee thereof, and will be set forth in a separate award agreement in such form as is prescribed by the Company, to be entered into by the Company and you.

Equity Grants. Subject to and upon the approval of the Board of Directors of the Company after your Start Date, the Company shall grant to you a stock option (the “Option”) under the Company’s 2019 Equity Incentive Plan, as it may be amended from time to time (the “Plan”), to purchase 200,000 shares (subject to any adjustments for any stock splits, stock dividends, reverse stock splits or recapitalizations that are effected at any time during the period commencing after the date of this letter and ending on the grant date of the Option, the “Option Shares”) of the Company’s common stock, $0.001 par value per share (the “Common Stock”), at an exercise price equal to fair market value of the Common Stock, as determined by the Board of Directors of the Company, on the date of the grant of the Option (the “Grant Date”).

Stock Option Grant: Subject to the approval of the Company’s Board of Directors (the “Board”), you will be granted an initial option to purchase 100,000 shares of the Company’s common stock at a price equal to the fair market value as approved by the Board. On-going equity grants will be reviewed on an annual basis.